To take a picture or video of the thermal image you are viewing while in camera mode, you’ll want and tap the big round button at the bottom of the screen (or side if your phone is horizontal). Swipe back and forth over the icon to switch between camera and video mode.
Any images or videos you take may be reviewed by visiting the media gallery, which can be accessed by pressing the ()button, located at the bottom left of the camera icon. Your images will also be saved to the mobile device's native camera roll, and in an album entitled “Seek Thermal”.